Hmm... That is weird. I have my Sawtooth G4 maxed out with three HDs and it's DVD drive, Everything worked fine. I know yours is a quicksilver, but they're not that far apart.

I have had some issues with certain PCs (glitchy BIOS I guess) where if I did not have the master/slave settings in the right order, one wouldn't be detected or it would make the post process take and extremely long time. So maybe you could switch your DVD to slave and the new HD to master and see what happens.

Hope this helps.

PowerPup.